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平行四邊形面積一
Author:
keihin
GeoGebra
New Resources
GeoGebra笔记功能体验课件
兩位數除以一位數（一）
兩組對邊相等的四邊形
画直线等分三角形的面积
畫出對稱圖形
Discover Resources
商高定理之正三角形2
等差數列2
分數與小數
認識角度
拋物線5--包絡線法
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Cylinder
Fractal Geometry
Scalene Triangles
Matrices
Planes